// 将字符串HTML转为DOM
function paseDom(htmlStr) {
    let el = document.createElement('div')
    el.innerHTML = htmlStr
    return el.childNodes[0]
}

// file生成URL
function blobToURL(file) {
    return new Promise((resolve, reject) => {
        const reader = new FileReader()
        reader.readAsDataURL(file)
        reader.onload = () => {
            resolve(reader.result)
        }
    })
}

// 生成UUID
function uuid(len, radix) {
    var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
    var uuid = [], i
    radix = radix || chars.length

    if (len) {
        for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix]
    } else {
        var r
        uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'
        uuid[14] = '4'
        for (i = 0; i < 36; i++) {
            if (!uuid[i]) {
                r = 0 | Math.random() * 16
                uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r]
            }
        }
    }
    return uuid.join('')
}

export {
    paseDom,
    blobToURL,
    uuid
}